The term 'eye part with rods and cones' refers to the RETINA, which is a light-sensitive layer of tissue that lines the back of the eye. It contains two types of photoreceptor cells: rods and cones. The rods are responsible for vision in dim light, while the cones are responsible for color vision and detailed vision in bright light. The RETINA is responsible for converting light into electrical signals that are sent to the brain, where they are interpreted as images.